Relating to the OP's post, my Droid isn't laggy at all. I have recently discovered three dead pixels, but I have a pending account change and so I can't get a new Droid shipped to me by the employee phone team until that order clears (next billing cycle... in two weeks).
Amazon.com's full site loads just fine for me. My notification bar is smooth to pull down, and I have two app updates, an alarm clock (snoozed), a text, and more than 10 emails waiting for me to check them. No lag at all.
I have about 10 applications installed and pulling up the menu bar from the bottom doesn't lag for me either, nor do I experience any lag when I scroll through (there's not much to scroll through though) the apps menu.
The only time I've ever experienced any lag was with the YouTube app... and it was only once and I haven't seen it act that way since. All web pages are smooth for me, not exactly as smooth as the iPod Touch's browser but pretty close, and I don't experience any lag when typing, opening/closing menus, or anything else on the phone. My phone is pretty close to stock Android given that most of my apps that are installed don't run processes unless opened explicitly (amazon.com app, an LED torch app for flashlight use, Facebook, DockRunner, Astrid, an Engadget and Google News RSS reader widget, Pandora, Backgrounds, Astro, and WeatherBug [for the date in the top left of the notification bar
]).
None of these give me any lag... if you're seeing a lot of lag, maybe really re-examine what apps you need, uninstall the rest, and see what happens. I had Handcent SMS installed, but it did start to lag my phone so I uninstalled it immediately. It's really not that great of an app if it's going to slow everything down and take some of the fun out of the phone. I can do without pretty colors, and please, those iPhone chat bubbles are hideous and low-res and look awful. What I can't do without and what I like is a fast phone with fluid menus and a brilliantly performing OS. My Droid, imo, has that.